READ THIS SUPPLEMENT AND YOUR CANNONDALE BICYCLE OWNER’S MANUAL. Both contain important safety information. Keep both for future reference.

Owner’s Manual Supplement

Lefty Oliver

Safety MessagesIn this supplement, particularly important information

is presented in the following ways:

Indicates a hazardous situation which, if not avoided, may result in death or serious injury.

NOTICEIndicates special precautions that must be taken to avoid damage.

3

CONTENTS

Safety Information 4

Technical Information 8

Replacement Parts 16

Maintenance 28

Limited Warranty 20

Notes 21

Cannondale Supplements

This manual is a “supplement” to your Cannondale Bicycle Owner’s Manual.

This supplement provides additional and important model specific safety, maintenance, and technical information. It may be one of several important manuals/supplements for your bike; obtain and read all of them.

Please contact your Authorized Cannondale Dealer immediately if you need a manual or supplement, or have a question about your bike. You may also contact us using the appropriate country/region/location information.

You can download Adobe Acrobat PDF versions of any manual/supplement from our website: http://www.cannondale.com

Contacting Cannondale

Cannondale USA

Cycling Sports Group, Inc. 1 Cannondale Way, Wilton CT, 06897, USA 1-800-726-BIKE (2453)

Cycling Sports Group Europe B V

Mail: Postbus 5100 Visits: Hanzepoort 27 7570 DB, OLDENZAAL, Netherlands

International Distributors

Consult our websIte to identify the appropriate Cannondale Dealer for your region.

Your Cannondale Dealer

To make sure your bike is serviced and maintained correctly, and that you protect applicable warranties, please coordinate all service and maintenance through your Authorized Cannondale Dealer.

NOTICEUnauthorized service, maintenance, or repair parts can result in serious damage and void your warranty.

4

Safety InformationIntended Use

137390 Rev 1 (05/20)

SAFETY INFORMATION

Intended Use

Condition 2, General Purpose Riding

Bikes designed for riding Condition 1, plus smooth gravel roads and improved trails with moderate grades where the tires do not lose ground contact.

INTENDED

For paved roads, gravel or dirt roads that are in good condition, and bike paths.

NOT INTENDED - DO NOT USE:

No large drops, drop-offs, wooden structures, or dirt embankments requiring long suspension travel or heavy duty components.

For Extreme forms of jumping/riding such as hard core mountain, Free riding, Downhill, North Shore, Dirt Jumping, Hucking etc.

No Tandems

No Motorcycles

No Engine powered vehicles

Using the Lefty the wrong way is dangerous.

Please read your Cannondale Bicycle Owner’s Manual for more information about Intended Use ASTM Conditions 1-5, and riding conditions defined by each.

The intended use and riding conditions defined by on-product markings and owner’s manual for the specific Lefty fork model MUST match those of the frame.

A mis-match between a Lefty fork and a frame can lead to failure of the frame or Lefty fork. Such a failure can lead to a loss of control, with the risk of serious injury or death to the rider.

If you have any questions consult a Cannondale Dealer or professional bike mechanic with experience in Intended Use conditions in the bicycle industry.

You can be severely injured, paralyzed or killed in an accident if you ignore this warning

5

Safety InformationImportant Composites Message

Important Composites Message

Your bike (frame and components) is made from composite materials also known as “carbon fiber.”

All riders must understand a fundamental reality of composites. Composite materials constructed of carbon fibers are strong and light, but when crashed or overloaded, carbon fibers do not bend, they break.

For your safety, as you own and use the bike, you must follow proper service, maintenance, and inspection of all the composites (frame, stem, fork, handlebar, seat post, etc.) Ask your Cannondale Dealer for help.

We urge you to read PART II, Section D. “Inspect For Safety” in your Cannondale Bicycle Owner’s Manual BEFORE you ride.

You can be severely injured, paralyzed or killed in an accident if you ignore this warning

Crash/Impact Damage Inspection

After A Crash Or Impact:

Inspect the entire bike, all parts; Look carefully for damage. See “Inspect For Safety” section in the Cannondale Bicycle Owner’s Manual. See Support at www.cannondale.com

Any of the following conditions indicate that serious fork damage is present:

• Any “klunking,” creaking, knocking or unexplained noises.

• A change in travel, and/or function.

• Loss of adjustment features, oil or air leaks, or loose/broken parts.

• Crash or impact damage (cracking, deep scratches, gouges, dents, or bending)

• Carbon which has a soft feel or altered shape, or broken, splintered, or delaminated carbon fiber.)

• Visible cracks, a white or milky color present in carbon fiber section

Continuing to ride a damaged frame /fork increases the chances of frame /fork failure, with the possibility of injury or death of the rider

6

Safety InformationMinimum Tire-to-Crown Clearance

137390 Rev 1 (05/20)

Minimum Tire-to-Crown Clearance

Modification or installation of damping cartridge/spacers other than specified; or installing over-sized tires can result in incorrect tire-to-crown clearance

Check for minimum tire fork/frame clearance with all air released from lefty and fully compressed.

Measure between the top of the properly inflated tire (1) and the bottom of the fork crown (2).

3 mm Minimum

Clearance

2

1

If tire clearance is less than the minimum specified, the rotating tire could come into contact with with the fork crown or frame causing the wheel to stop suddenly. This can throw a rider off the bicycle or result in a loss of control and crash.

Compression Assembly

55mm

1

5

2

3

4

For carbon steerer models, use only the headset compression assembly (1) specified for the model. See “Specifications.”

Do not use other headset compression/preload adjusters, shims, and do not modify the steerer.

Do not Stack spacers (3) on top of the stem (2) or exceed the 55 mm Maximum Stack Height (total spacer height stacked between the top of the head tube (5) and the stem (2). Exceeding maximum stack height with spacers (3) or locating spacers on top of the handlebar stem can place significant stress on the steerer tube (4). It could break.

Follow the Cannondale compression assembly installation instructions.

Use a torque wrench to tighten. Follow stem manufacturer’s torque specifications.

7

Safety InformationFront Brake

Making External Adjustments

Make any external adjustments only when stopped. Attempting to adjust while riding can result in a loss of control.

You can be severely injured, paralyzed, or killed in an accident if you ignore these warnings

Disassembly or Modification

Modifications can lead to serious fork damage or serious personal injury

Do not modify the Lefty in any way.

Use only original equipment (OE) replacement parts. See “Replacement Parts.”

Do not attempt damage repair yourself. Have any required repair services or procedures perform by an Authorized Cannondale Dealer or Cannondale Authorized Service Center.

You can be severely injured, paralyzed or killed in an accident if you ignore this warning

Front BrakeThe brake mount (1) is compatible with flat -mount type brake systems.

21

Before riding, make sure the StopLock release lever is in the locked position (shown). See “Front Wheel” removal and installation instructions.

Follow brake manufacturer’s instructions when mounting the brake caliper.

Do not ride without a front brake system attached to the Lefty. A brake system (disc/caliper) is an important secondary wheel retention system. If the brake system is missing or improperly installed, and/or if the wheel hub axle bolt should loosen, the front wheel could slide off the spindle end.

You can be severely injured, paralyzed, or killed in an accident if you ignore this warning

8

IdentificationParts of the Oliver

137390 Rev 1 (05/20)

IDENTIFICATION

XXX/XXXXXXXXXXX

17

19

16

15

7

6

8

12

11

13

14

18

1

2

3

910

5

4

20

22

21

1. Steerer2. Integrated crown race

(carbon only)3. Crown4. Outer Tube5. Inner Tube6. Lockout Lever7. Brake Cable Guide,

Upper8. Brake Cable Guide,

Lower9. Wiper Seal10. O-ring, travel indicator11. StopLock Brake Mount12. StopLock Release Lever13. Wheel Spindle14. Rebound Adjuster15. Air Valve16. Serial Number (etched)17. Wheel Size/Travel18. Lefty 50 Hub19. Bolt, axle20. Label, Warning21. Serial Number Label22. Compression assembly

(carbon only)

Parts of the Oliver

9

Technical InformationSpecifications

TECHNICAL INFORMATIONSpecifications

Item Specification

Carbon Alloy

Wheel Size 650b 700c 650b 700c

External Adjustments Air Pressure, Rebound, Lockout

Remote Compatibility n/a

Recommended Sag - 0% 0 mm

Travel Length (mm) 30 40 30 30 40 30

Ramp Rings (stock amount) 3 0 3 3 0 3

Ramp Rings (maximum count) 6 6 6 6 6 6

Axle-to-Crown (mm) 405 415 419 405 415 419

Minimum Tire-to-Crown Clearance 3 mm

Fork Offset 55 mm

StopLock Brake Adapter Mount (disc dia./ adapter)”

160mm/ K53011

Hub Compatibility Lefty 50

Brake Rotoe Maximum Size 180 mm

Maximum Tire Size: (Dia. x Width)”

650b x 47mm 700c x 45mm

650b x 47mm 700c x 45mm

Headset Compression Assy. Only Cannondale

p/n K35009

1 1/8 in Star Nut

Aheadset - ASN8

Maximum Stack Height 55 mm

Stem Clamp Dia. 28.6 mm

Steerer: Type/ Taper Length/ Overall Length

Tapered 1.5in - 1 1/8in/ 86mm/ 330mm

Crown Race: Type/Bearing/Degree Bonded 1.5in/ 36 degree 1.5in/ 36 degree

Manual Reset Length +/- 3mm 5 mm 5 mm 19 mm 5 mm 5 mm 19 mm

Air Pressure Limits Minimum: 50 psi/ 3.5 bar

Maximum: 200 psi/ 13.75 bar

Intended Use ASTM CONDITION 2: General Purpose Riding

“Max. Weight Limit Total (Rider+All Equipment)”

304 lbs/138 Kg

10

Technical InformationExternal Adjustments

137390 Rev 1 (05/20)

External Adjustments

Air Pressure

Set the initial air pressure according to your weight (including the weight of riding gear) based upon the following table. Then, adjust air pressure in small amounts for your riding preference.

Adding more air will result in a stiffer suspension feel. Less air pressure will result in a softer suspension feel. Stay within the minimum and maximum air pressure limits.

2

1

Figure 2

To set air pressure:

1. Clean the area around the valve and the pump end to remove dirt or contaminants.

2 Remove the valve cap (1), attach a high-quality suspension pump to the valve (2) .

3. Pressurize to the recommended air pressure

4. When completed, remove the pump; replace the valve cap.

Air Pressure/Rebound Recommendation

Rider + Gear Weight

Air Pressure (psi)

Rebound (Clicks out from slow)Lbs Kg

120 55 70 10

130 59 76 9

140 64 79 9

150 68 85 8

160 73 88 8

170 77 94 7

180 82 97 7

190 86 102 6

200 91 106 6

210 95 111 5

220 100 115 5

230 105 120 4

240 109 124 4

250 114 129 4

Air Pressure Limits: Minimum: 50 psi/ 3.5 bar Maximum: 200 psi/ 13.75 bar

NOTICE• Stay within Air pressure limits.

• Attach pump only if valve and pump are clean.

11

Technical InformationExternal Adjustments

Rebound

The Rebound adjuster (3) is located at the bottom of the Lefty. Rebound controls the speed that Lefty returns after being compressed.

3

Figure 3

To set rebound:

1. Close the adjuster by rotating it clockwise toward the “SLOW” direction with your fingers until the adjuster stops.

2. Determine the number of “clicks” according to the table.

3. From closed, turn the adjuster counter-clockwise toward the “FAST” direction with your fingers and count the “clicks” as you hear or feel them until you reach the desired setting.

To fine tune rebound:

Each click towards the “SLOW” direction decreases rebound speed.

Each click toward the “FAST” direction increases rebound speed

Lockout

Use the lockout lever (4) to change between climb and active modes.

4

Figure 4

Climb

In climb mode, compression damping is significantly increased making it more difficult to compress the suspension unless large bumps are encountered. Climb mode is a firmer more efficient pedaling platform.

Active

In active mode, travel suspension is actively absorbing changes in terrain by compressing and extending.

LOCKEDFAST LOCKEDSLOW

LOCKEDACTIVE

LOCKEDCLIMB

12

Technical InformationFront Wheel

137390 Rev 1 (05/20)

Front Wheel

Removal

1. Secure the bike in a work stand with the front wheel off the ground slightly.

2. Rotate the StopLock release lever 180 degrees so it is pointing downward (un-locked).

Figure 5

3. Pull the brake mount with attached brake caliper backwards until caliper is clear of the brake rotor.

Figure 6

NOTICE• Do not allow the brake to hang by the

brake line.

• Support the removed brake mount/caliper to prevent damage of the brake system while it is detached.

4. Insert a 5mm hex key into the Lefty hub axle bolt on the drive side of the bike. Turn the axle bolt counter-clockwise. Continue turning until the axle bolt is completely disenagaged from the spindle.

LOCKEDUN-LOCKED

13

Technical InformationFront Wheel

Figure 7

NOTICE• Make sure the axle bolt is completely

disengaged before attempting to remove the wheel.

• Never pull the wheel off forcefully. If the axle bolt is still engaged this will damage the threads.

5. Slide the wheel off the spindle end.

Important: While the wheel is off, take steps to prevent damage to the spindle .

Allow the bike to remain in the stand until the wheel is re-installed.

Likewise, while the wheel is removed, be sure to protect the wheel, hub, and brake rotor from damage or contamination. Cover the hub opening to prevent contamination of the inside of the hub.

Installation

1. With bike in a work stand, clean the spindle (1), and axle threads (a). Apply light grease to the threads (a) and outer (b) and inner (c) hub bearing lands.

Figure 8

3. Check the inside of the Lefty wheel hub for dirt or contamination, wipe clean if necessary. Apply light grease to the hub bearing inner races.

4. Align and slide the wheel straight on to the spindle. Using a 5 mm hex key by hand, start engagement of the axle bolt to a few threads to confirm correct thread engagement. Once confirmed, tighten the axle bolt to 15 N·m with a torque wrench.

14

Technical InformationFront Wheel

137390 Rev 1 (05/20)

6. With the StopLock release lever turned down, slide the brake mount/caliper into the Lefty. As you do this, make sure the brake rotor locates between the brake pads.

7. With the brake mount firmly seated to the Lefty, turn the StopLock release lever up to lock the brake adapter/caliper onto the lower leg.

LOCKEDBLOCKED

Figure 10

8. Spin the wheel to make sure it rotates freely.

9. Be sure to test the brakes for proper function before riding.

Use a torque wrench to tighten.

Prevent grease contamination of brake caliper, pads and brake rotor.

15

Technical InformationManual Bearing Reset

(A)

2

1

5

4

3

Manual Bearing ResetPerform the following procedure with the front wheel on the floor.

1. Slide the travel indicator O-ring (1) against the wiper seal (2).

2. Remove the valve cap (3) and attach a suspension pump to the valve (4). Record the air pressure, then release all the air with the pump bleed valve. NOTE: Due to the small air chamber volume, the suspension pump may read 15-35psi lower than the original fill pressure. Original fill pressure, travel, and ramp ring configuration will influence this effect.

3. Hold the shock pump bleed valve open and fully compress the Lefty by pushing down on the handlebars.

4. Firmly bottom out the Lefty several times.

5. Measure the glossy stanchion tube (5) below the travel indicator o-ring (1). Repeat step 4 until that measurement matches the stanchion length that corresponds to your Lefty in the table below.

Travel Wheel Size(A) Reset Length

+/- 3 mm

30 650b 5 mm

40 650b 5 mm

30 700c 19 mm

6. Set the air pressure recommended for your riding weight or original recorded air pressure.. See “Air Pressure.”

7. Remove the shock pump;return the valve cap.

16

Replacement PartsParts List

137390 Rev 1 (05/20)

REPLACEMENT PARTSParts List

ID Part Number Structure Parts

A K53089 Lefty Cable Guide

B K53011 Lefty Oliver StopLock Brake Adapter

C K53021 Lefty Oliver StopLock Release Lever

D K53031 Lefty StopLock Hourglass Bolt 32mm

E K54128 Lefty Helicoils Qty 10

ID Part Number Damper and Air Spring Parts

F K53001 Lefty Oliver Bottom Cap

G K51001 Lefty Iso Ramp Rings

H K51011 Lefty Iso Upper Air Seal 34mm

I K52001 Lefty Chamber Lockout Lever No LSC

J K52011 Lefty Lockout Detent Assembly

_ K57001 Lefty Iso 100 Hour Seals

K K52021 Lefty Chamber Damper All-Over

L K51021 Lefty Iso Air Piston 688 OD

M K51031 Lefty Iso Air Piston 717 OD

O K51039 Sidecar Valve Assembly

P K36029 Lefty Rebound Knob Assy

ID Part Number Steerer and Headset Parts

Q K35009 SL Compression Plug w/ Top Cap

ID Part Number Service Tools

R CK9108U00OS 39mm 18 Point Lefty Damper Tool

S CK9158U00OS Lefty 10mm Bullet Tool

17

Replacement PartsParts Illustration

28.0 N·mSlick Honey3600 - light coat to O-ring and threads.

28.0 N·m14 mm socket

10.0 N·m14 mm 6 Point Socket

7.3 N·m6 mm hex

0.7 N·m2.5 mm hexLoctite® 222 (purple)

Marine grease, light coat on threads. Avoid excessive grease on or around o-ring seal.

marine grease, light coat to o-ring, hex shaft, detent ball, and running surfaces.

Slick Honey, light coat to o-ring.

Do not adjust hourglass bolt or jam nut. See your dealer.

EB

A

C

D

E 10X

G5X

F

I

J

EH

M

K

O

P

L

S

R

Q

0.5 N·m2 mm hex

0.3 N·m1.5 mm hex

Marine grease, light coat, to detent balls and running surfaces.

Slick Honey, light coat on lockout lever seal.

marine grease, light coat to hourglass bolt.

marine grease, light coat to cam bolt.

assemble air piston assembly to damper shaft using CK9158U00OS Lefty 10mm Bullet Tool after grease application.

S

ID and ODair piston seals. Slick Honey, medium coat.

Slick Honey,light coat on o-ring.

Slick Honey, light coat, bumper andplastic washer.

Slick Honey, light coat to entire cylinder and damper shaft. Do not grease sealhead threads.

Parts Illustration

18

Maintenance Schedule

137390 Rev 1 (05/20)

MAINTENANCE

ScheduleThis schedule is intended as a guide only. You must establish a schedule appropriate to your riding style and conditions. All service items indicated as “Owner” are found in this supplement.

Service Item Frequency/Interval Performed By

Damage Inspection Before Every Ride Owner

Check Fastener TorqueFirst Ride & Every 4-5 Rides

Owner

Manual Bearing Reset Every 50 Hours Owner

100 Hour Service : (Air Spring Service, Damper Inspection)

Every 100 Hours/ Annually

Authorized Cannondale Dealer or Authorized Headshok Service Center

Full Service: (Telescope Rebuild, Air Spring Service, Damper Service)

Every 200 Hours/ Bi-Annually

Authorized Headshok Service Center

Schedule Professional Fork Service Annually (Minimum)

Annually, or when problems are indicated you must have your fork serviced through an Authorized Cannondale Dealer or a Headshok Service Center. Disassembly and inspection by a suspension professional is required to evaluate the internal and external parts, identify wear or damage. Damaged parts must be replaced with new ones and the work must also include any work described in any technical bulletins or product recalls.

Please Note: Shorter service intervals are recommended for riders seeking the highest possible performance or who experience the following situations: (1) High frequency of riding, (2) Adverse conditions while riding, (3) Bicycle storage in an area of high humidity, large temperature changes or outdoor conditions

Frequent maintenance and inspection is important to your safety. Ask your Cannondale Dealer to help you develop a complete maintenance program, one that suits where and how you ride. You can be severely injured, paralyzed or killed riding on a broken or poorly maintained fork.

19

Maintenance Cleaning

CleaningClean using only a mild soap and water solution. Clean water and common liquid dish washing soap will work best. Be sure to cover the adjusters with a clean plastic bag secured with a rubber band or masking tape. Spray off heavy dirt before wiping. Spray indirectly.

NOTICEDo not use a pressure washer Don’t dry with compressed air Use a low pressure garden hose and dry with a clean shop towel. Power washing/drying will force contaminants into the fork promoting corrosion, immediately damaging the fork, or resulting in accelerated wear.

Tightening TorquesCorrect tightening torque for the fasteners (bolts, screws, nuts) on your bicycle is very important to your safety, the durability and performance of your bicycle. We urge you to have your dealer correctly torque all fasteners using a torque wrench. If you decide to tighten fasteners yourself always use a good torque wrench!

20

Limited WarrantyCleaning

137390 Rev 1 (05/20)

Cannondale Limited Warranty

Cannondale (HEADSHOK, LEFTY, FATTY, SOLO) suspension products are covered under the terms and conditions of the Cannondale Limited Warranty. It is available on the Policies page of our website at: www.cannondale.com Be sure to read the exclusions listed in the limited warranty. For example, damage from accidents and improper maintenance are not covered.

Definitions related to forks:

The fork structure is covered in the FRAMES section of the Cannondale Limited Warranty. “Fork structure” means certain structural parts of the fork, specifically the fork legs, outer tube, the steerer tube, steerer tube clamps and the inner tubes with attached dropouts or spindle. Cable clamps, needle bearings, races, and bushings which are part of the telescopic assembly are normal wear and tear items and ARE NOT covered by the limited lifetime warranty.

The internal fork are covered by the 1 year (2 years in EU countries) warranty against defects in materials or workmanship described in the COMPONENTS section of the Cannondale Limited Warranty. “Internal fork parts” are defined as items such as damping cartridges and their internal parts, seals, o-rings, air cylinders, air pistons, springs, elastomers, bumpers, bushings, needle bearings, races, and oil. Normal wear and tear on these items is NOT covered by this 1 year (2 in EU) warranty. Like brake pads on a car, you should expect to have these items professionally replaced or renewed as you use the fork and they wear.

Fork Warranty Claims

For any warranty claim to be considered, the bicycle/fork must be brought into an Authorized Cannondale Retailer on the continent on which the bicycle/fork was purchased. The bicycle/fork must be in assembled condition and accompanied by the original, dated sales receipt for the bicycle/fork.

Dealer Locator at: www.cannondale.com/Dealerlocator

LIMITED WARRANTY

21

Use NOTES pages to write /record important information about your bike : (e.g. maintenance history, dealer contact information, settings, etc.)

NOTES

CANNONDALE USACycling Sports Group, Inc.1 Cannondale Way, Wilton CT, 06897, USA1-800-726-BIKE (2453)www.cannondale.com

CANNONDALE EUROPECycling Sports Group Europe, B.V.Hanzepoort 27, 7575 DB, Oldenzaalcontact@cyclingsportsgroup.com

CANNONDALE UKCycling Sports GroupVantage Way, The Fulcrum, Poole, Dorset, BH12 4NU+44 (0)1202732288sales@cyclingsportsgroup.co.uk

www.cannondale.com© 2020 Cycling Sports GroupLefty Oliver Owner’s Manual Supplement 137390 Rev. 1